<template>
  <div class="login-container">
    <!-- 顶部 -->
    <div class="absolute-tl flex-x-end p-3 w-full">
      <el-switch
        v-model="isDark"
        inline-prompt
        :active-icon="Moon"
        :inactive-icon="Sunny"
        active-color="var(--el-fill-color-dark)"
        inactive-color="var(--el-color-primary)"
        @change="handleThemeChange"
      />
      <lang-select class="ml-2 cursor-pointer" />
    </div>
    <!-- 登录表单 -->
    <el-card class="!border-none !bg-transparent !rounded-4% w-100 <sm:w-85">
      <div class="text-center relative">
        <h2>{{ defaultSettings.title }}</h2>
        <el-tag class="ml-2 absolute-tr">{{ defaultSettings.version }}</el-tag>
      </div>

      <el-form
        ref="loginFormRef"
        :model="loginData"
        :rules="loginRules"
        class="login-form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <div class="p-2">
            <svg-icon icon-class="user" />
          </div>
          <el-input
            ref="username"
            v-model="loginData.username"
            class="flex-1"
            size="large"
            :placeholder="$t('login.username')"
            name="username"
          />
        </el-form-item>

        <!-- 密码 -->
        <el-tooltip
          :disabled="isCapslock === false"
          content="Caps lock is On"
          placement="right"
        >
          <el-form-item prop="password">
            <span class="p-2">
              <el-icon><Lock /></el-icon>
            </span>
            <el-input
              v-model="loginData.password"
              class="flex-1"
              size="large"
              :placeholder="$t('login.password')"
              :type="passwordVisible === false ? 'password' : 'input'"
              name="password"
              @keyup="checkCapslock"
              @keyup.enter="handleLogin"
            />
            <span class="mr-2" @click="passwordVisible = !passwordVisible">
              <el-icon v-if="passwordVisible === false"><View /></el-icon>
              <el-icon v-else><Hide /></el-icon>
            </span>
          </el-form-item>
        </el-tooltip>

        <!-- 验证码 -->
        <el-form-item prop="captchaCode" class="flex-x-between">
          <div class="flex">
            <span class="p-2">
              <svg-icon icon-class="captcha" />
            </span>

            <el-input
              v-model="loginData.captchaCode"
              auto-complete="off"
              size="large"
              :placeholder="$t('login.captchaCode')"
              class="mr-[10px]"
              @keyup.enter="handleLogin"
            />
          </div>

          <div class="flex-x-end w-[120px] cursor-pointer" @click="getCaptcha">
            <el-image
              :src="captchaBase64"
              class="rounded-tr-md rounded-br-md h-[48px]"
            >
              <template #error>
                <el-icon><Picture /></el-icon>
              </template>
            </el-image>
          </div>
        </el-form-item>

        <el-button
          :loading="loading"
          type="primary"
          class="w-full"
          @click.prevent="handleLogin"
          >{{ $t('login.login') }}
        </el-button>

        <!-- 账号密码提示 -->
        <div class="mt-10 text-sm">
          <span>{{ $t('login.username') }}: admin</span>
          <span class="ml-4"> {{ $t('login.password') }}: 123456</span>
        </div>
      </el-form>
    </el-card>

    <!-- ICP备案 -->
    <div
      class="absolute bottom-1 text-[10px] text-center"
      v-show="useAppStore().device == 'desktop'"
    >
      <p>
        Copyright © 2021 - 2024 youlai.tech All Rights Reserved. 有来技术
        版权所有
      </p>
      <p>皖ICP备20006496号-3</p>
    </div>
  </div>
</template>

<script setup lang="ts">
import { useSettingsStore, useUserStore, useAppStore } from '@/store'
import { Sunny, Moon } from '@element-plus/icons-vue'
import router from '@/router'
import { LocationQuery, LocationQueryValue, useRoute } from 'vue-router'
import { getCaptchaApi } from '@/api/auth'
import { LoginData } from '@/api/auth/types'

const route = useRoute()
const userStore = useUserStore()
const settingsStore = useSettingsStore()

import defaultSettings from '@/settings'
/**
 * 明亮/暗黑主题切换
 */
const isDark = ref<boolean>(settingsStore.theme === 'dark')
const handleThemeChange = (isDark: any) => {
  useToggle(isDark)
  settingsStore.changeSetting({
    key: 'theme',
    value: isDark ? 'dark' : 'light'
  })
}

/**
 * 根据屏幕宽度切换设备模式
 */
const appStore = useAppStore()
const WIDTH = 992 // 响应式布局容器固定宽度  大屏（>=1200px） 中屏（>=992px） 小屏（>=768px）
const { width } = useWindowSize()
watchEffect(() => {
  if (width.value < WIDTH) {
    appStore.toggleDevice('mobile')
  } else {
    appStore.toggleDevice('desktop')
  }
})

const loading = ref(false) // 按钮loading
const isCapslock = ref(false) // 是否大写锁定
const passwordVisible = ref(false) // 密码是否可见
const captchaBase64 = ref() // 验证码图片Base64字符串
const loginFormRef = ref(ElForm) // 登录表单ref

const loginData = ref<LoginData>({
  username: 'admin',
  password: '123456'
})

const { t } = useI18n()
const loginRules = computed(() => {
  const prefix = appStore.language === 'en' ? 'Please enter ' : '请输入'
  return {
    username: [
      {
        required: true,
        trigger: 'blur',
        message: `${prefix}${t('login.username')}`
      }
    ],
    password: [
      {
        required: true,
        trigger: 'blur',
        validator: (rule: any, value: any, callback: any) => {
          if (value.length < 6) {
            callback(new Error('The password can not be less than 6 digits'))
          } else {
            callback()
          }
        },
        message: `${prefix}${t('login.password')}`
      }
    ],
    captchaCode: [
      {
        required: true,
        trigger: 'blur',
        message: `${prefix}${t('login.captchaCode')}`
      }
    ]
  }
})

/**
 * 检查输入大小写状态
 */
function checkCapslock(e: any) {
  const { key } = e
  isCapslock.value = key && key.length === 1 && key >= 'A' && key <= 'Z'
}

/**
 * 获取验证码
 */
function getCaptcha() {
  getCaptchaApi().then(({ data }) => {
    loginData.value.captchaKey = data.captchaKey
    captchaBase64.value = data.captchaBase64
  })
}

/**
 * 登录
 */
function handleLogin() {
  loginFormRef.value.validate((valid: boolean) => {
    if (valid) {
      loading.value = true
      userStore
        .login(loginData.value)
        .then(() => {
          const query: LocationQuery = route.query

          const redirect = (query.redirect as LocationQueryValue) ?? '/'

          const otherQueryParams = Object.keys(query).reduce(
            (acc: any, cur: string) => {
              if (cur !== 'redirect') {
                acc[cur] = query[cur]
              }
              return acc
            },
            {}
          )
          router.push({ path: redirect, query: otherQueryParams })
        })
        .catch(() => {
          // 验证失败，重新生成验证码
          getCaptcha()
        })
        .finally(() => {
          loading.value = false
        })
    }
  })
}

onMounted(() => {
  getCaptcha()

  // 主题初始化
  const theme = useSettingsStore().theme
  useSettingsStore().changeSetting({ key: 'theme', value: theme })
  if (theme == 'dark') {
    document.documentElement.classList.add('dark')
  } else {
    document.documentElement.classList.remove('dark')
  }
})
</script>

<style lang="scss" scoped>
.dark .login-container {
  background: url('@/assets/images/login-bg-dark.jpg') no-repeat center right;
}

.login-container {
  overflow-y: auto;
  background: url('@/assets/images/login-bg.jpg') no-repeat center right;

  @apply wh-full flex-center;

  .login-form {
    padding: 30px 10px;
  }
}

.el-form-item {
  background: var(--el-input-bg-color);
  border: 1px solid var(--el-border-color);
  border-radius: 5px;
}

:deep(.el-input) {
  .el-input__wrapper {
    padding: 0;
    background-color: transparent;
    box-shadow: none;

    &.is-focus,
    &:hover {
      box-shadow: none !important;
    }

    input:-webkit-autofill {
      transition: background-color 1000s ease-in-out 0s; /* 通过延时渲染背景色变相去除背景颜色 */
    }
  }
}
</style>
